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IR3897MPBF Datasheet(PDF) 35 Page - International Rectifier |
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IR3897MPBF Datasheet(HTML) 35 Page - International Rectifier |
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35 / 45 page  - 35 - AUGUST 08, 2012 |DATA SHEET | Rev 3.3 35 IR3897 4A Highly Integrated SupIRBuck TM Single‐Input Voltage, Synchronous Buck Regulator PD‐97663 Vo=0.6V Boot Vcc/LDO_out Fb Comp Gnd PGnd SW S_Ctrl PGood PGood Enable Rt/Sync Vin=12 V Vin Vp R5 5.36k Co=5X22uF Lo 680nH C4 2.2nF R4 169 R3 2.1k C3 15nF C2 220pF C1 0. 1 uF Cin = 3 X 10uF Rt 39.2 K RPG 49.9k R1 49.9k R2 7.5k IR3897 2.2uF CVcc PVin Vref Vsns R7 5.36k Cvin 1.0uF U1 C5 0.1uF C6 0.1uF 1.5k 1.5k R6 VDDQ=1.2V R8 10nF C7 N/S (optional) Figure 30: Application Circuit for a 12V to 0.6V, 4A, VTT rail Boot Vcc/LDO_out Fb Comp Gnd PGnd SW S_Ctrl Vo=0.6V PGood PGood Enable Rt/Sync Vin=1.2V Vin Vp R5 5.62k Co=5X22uF Lo 0.4uH C4 2.2nF R4 182 R3 4.64k C3 5.6nF C2 110pF C1 0. 1 uF Cin = 3 X 22uF Rt 39.2 K RPG 49.9k IR3897 2.2uF CVcc PVin Vref Vsns R7 5.62k U1 C5 0.1uF C6 0.1uF 1.5k 1.5k R6 R8 10nF C7 Ext VCC Enable Vin=1.2V N/S (optional) Figure 31: Application Circuit for a 1.2V to 0.6V, 4A, VTT rail |
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